THE STATE OF THE ELECTRONIC CATCH ASSESSMENT (eCAS) SURVEY IN RUMAKI SEASCAPE

A case of Kibiti, Mafia, and Kilwa Districts

Baraka Kuguru, Innocent Sailale, Masumbuko Semba & Owen Kibona

2023-08-02

Layout

Agenda

  1. Genesis of the work
  2. How we did the work
  3. Results
  4. Management implications
  5. Recommendations

Genesis of the work

Genesis ….

  • Previous assessment focused on fisheries performance -RUMAKI -Non RUMAKI

  • It used electronic Catch Assement Survey (eCAS) Data

  • Enviromental Data (SST, Chl-a)

  • The findings from this assesment led to explore the baseline

objectives

  1. To analyze the quantity and quality of the available eCAS data
  2. To assess the spatial distribution of priority fisheries
  3. Assess annual catch rate trends from eCAS and MIMP dataset
  4. Assess annual production trends from CAS and eCAS dataset
  5. To identify fisheries performance indicator

How the work was done

RUMAKI SeaScape

The study was conducted in the seascape of Kibiti, Kiwa and Mafia

  • Over 50% of landing sites records in eCAS
  • High biodiversity
  • High fish production
  • WWF Conservation Area

Datasets

CFMAS

Catch Records

Priority fisheries

Catch Rate Analysis

\[ CatchRate_{(i,j)} = \frac{Weight_{(i,j)}}{Fishers_{(i,j)}} \qquad(1)\] Where:

\(i\) = vessels

\(j\) = priority fishery

Annual Production Analysis

\[ TP = \frac{\gamma}{\iota} \times \frac{\omega}{\alpha} \times \kappa \qquad(2)\] Where:

\(\gamma\) = weight

\(\iota\) = boat gear combination

\(\omega\) = active fishing days

\(\alpha\) = Number of days in a month

\(\kappa\) = Total number of fishing effort (boat gear) in a distric

Key findings

Quantity and Quality of eCAS data

Quantity by district and priority fishery

Quantity by district and ……

Quantity by CFMA and priority fishery

Quantity by CFMA and priority fishery….

Based on the amount of catch data records in the eCAS system, we only selected;

  • Six priority fisheries
  • Six CFMAS with over 1000 records

eCAS percentage of gear by CFMA

eCAS percentage of gear by Priority fishery

Spatial distribution of priority fisheries

catch rates by Priority fishery & CFMAs

Reef fishery by CFMAS

Small Pelagics fishery by CFMAS

Tuna fishery by CFMAS

Octopus fishery by CFMAS

Elasmobranches fishery by CFMAS

Prawns fishery by CFMAS

Other fisher fishery by CFMAS

Catch rate trend by districts

Catch rate trend by CFMAs

Total production by districts

Total production by systems

Fisheries Performance Indicators

The Management implications

  • The digitalization of fishery sector
  • Enhance data collection and storage
  • Foster collaboration between stakeholders
  • Availability and accessibility
  • Increase efficiency

Recommendations

  • Data collection at CFMA level
  • Improve data monitoring strategy
  • Add Automated data quality monitoring tools

Acknowledgements

Miscellenous

The Coastal Richness

Mafia Benthic